Do you think this will be particularly common over the next three days? We see this submitted irregularly, fairly constantly, and I've not seen it being especially "clumpy".
Most of them have been flagged and thus deleted, but you can see that it's just constant, although infrequent:
https://hn.algolia.com/?query=Y%20Combinator:%20Bookmarklet&...
Just flag it and move on.