<p>In the light of recent events (e.g. <a href="https://lists.openstreetmap.org/pipermail/talk/2019-February/082064.html" rel="nofollow">https://lists.openstreetmap.org/pipermail/talk/2019-February/082064.html</a>), I'm reopening this issue. We should reconsider to introduce to limits for both the number of elements in a relation, as well as the maximum number of tags. Creating an insane amount of data via some buggy script is just too easy, and putting some safeguard in place to prevent the worst from happening isn't probably too bad an idea.</p>

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