It is possible for a user to harass an other one by overflowing notifications with thanks.
Two examples:
- https://en.wikipedia.org/w/index.php?title=Special%3ALog&type=thanks&user=Tsynko&page=User%3AThibaut120094&year=&month=-1&tagfilter=
- https://fr.wikipedia.org/w/index.php?title=Sp%C3%A9cial:Journal&type=thanks&user=Tsynko&page=User%3AThibaut120094&year=&month=-1&tagfilter=
Have a way to set a limit would be good.