Bad, but how bad?

See 177.67.96.78 (talk • contribs • whois • deleted contribs • nuke • abuse filter log • block • block log • active blocks • global blocks). This Brazilian IP has been copypasting {{wikipedia|lang=nl}}===Etymology==={{PIE root|nl|(s)tewp}}{{rfe|nl}} into all of their Dutch edits for days, now, as well as misusing the "Related terms" header. They also have been adding hyphenation and pronunciation (including separate Netherlands and Belgium IPA). I'm tempted to just revert everything, but I have no clue whether the pronunciation and hyphenation is worth saving. I've left a note on their talk page and reverted some of their simpler edits, but I really need a reality check before I do anything systematic. Thanks!

The etymologies can definitely go. The separate NL and BE IPA can go too, our practice is to use diaphonemic representations for Dutch.