Please don't accuse editors of vandalism unless you're sure they have committed it. In particular, avoid using the word in edit summaries (such as "reverting vandalism"), and be very careful about posting vandalism warning templates on users' talkpages. Review the vandalism policy thoroughly before you do that, and see especially the section "What vandalism is not". Note that content disputes are not vandalism, and that good-faith edits of any kind, even if you think them misguided, are not to be considered vandalism. Vandalism accusations without any basis in policy are bad for the climate on the wiki and make constructive discussion more difficult. See also Wikipedia:Avoid the word "vandal".