 **Summary:**
The paper introduces APBench, a benchmark designed to assess the effectiveness of availability poisoning attacks and defenses. APBench includes a comprehensive evaluation of 9 state-of-the-art availability poisoning attacks, 9 defense algorithms, and 4 data augmentation techniques across various datasets and model architectures. The benchmark is intended to provide a standardized platform for evaluating the performance of these attacks and defenses, thereby facilitating research in the field. The authors conducted experiments to demonstrate the effectiveness of the attacks and defenses, highlighting the need for further research in this area.

**Strengths:**
- The paper provides a comprehensive evaluation of the performance of different poisoning attacks and defenses, which is beneficial for understanding the current state of the field.
- It introduces a new benchmark, APBench, which covers a wide range of poisoning attacks and defenses, providing a valuable resource for the community.
- The paper is well-written, making it easy to understand and follow, with a clear presentation of the results.
- The authors have conducted a large number of experiments, which are detailed and thorough, providing insights into the effectiveness of different attack and defense methods.
- The paper addresses an important and timely topic, as availability poisoning attacks are becoming increasingly relevant in the era of large-scale data collection.

**Weaknesses:**
- The paper lacks a detailed discussion on the limitations of the proposed benchmark, which could help in understanding the scope and applicability of the results.
- There is a need for more detailed comparisons between different attack and defense methods, particularly in terms of their effectiveness and computational efficiency.
- The paper could benefit from a more in-depth analysis of the results, especially in terms of the transferability of attacks across different models and datasets.
- The paper does not sufficiently address the ethical implications of availability poisoning attacks, which is a significant concern given the potential misuse of these techniques.
- The paper could benefit from a more comprehensive evaluation of the defenses, including a discussion on the trade-offs between different defense methods in terms of effectiveness and computational cost.

**Questions:**
- How does the proposed benchmark compare to existing benchmarks in terms of its coverage and effectiveness in evaluating availability poisoning attacks and defenses?
- Can the authors provide more detailed comparisons between different attack and defense methods, particularly in terms of their effectiveness and computational efficiency?
- How does the proposed benchmark address the ethical concerns associated with availability poisoning attacks?
- Could the authors elaborate on the limitations of the proposed benchmark and discuss potential future directions for research in this area?
- How do the results of the benchmarking experiments contribute to the understanding of the effectiveness of different attack and defense methods, and what insights can be gained from these results?

**Soundness:**
3 good

**Presentation:**
3 good

**Contribution:**
3 good

**Rating:**
7 accept, but needs minor improvements

**Paper Decision:**
- Decision: Accept
- Reasons: The paper introduces a valuable benchmark for evaluating availability poisoning attacks and defenses, which is a significant contribution to the field. The benchmark is comprehensive and includes a variety of attacks and defenses, which are evaluated across different datasets and model architectures. The reviewers have highlighted the paper's clarity and the thoroughness of the experiments, which support the claims made. However, the paper could benefit from more detailed discussions on the limitations of the benchmark and the ethical implications of the attacks. The decision to accept is based on the originality of the benchmark, the methodological soundness of the experiments, and the significance of the results, which are well-presented and contribute to the understanding of availability poisoning attacks and defenses.