Please stop a user who goes around messing up cast lists

I was just looking at the page for the Spanish film "No es nada, mamá, sólo un juego" (1974) here: https://www.imdb.com/title/tt0070451/

What I immediately noticed is that the cast list has been completely messed up. Instead of just the character names, someone has added a dash after the character names followed by a description of the character, so that the cast list now has characters like "Juan / son", "Louise / mother", "Lucia / murdered girl" etc.

This isn't the first time I've come across this. In fact, I'm seeing it very often, and here are five more random examples of pages that are affected by the same problem:

Orgasmo (1969) https://www.imdb.com/title/tt0063413/

Cecilia (1983) https://www.imdb.com/title/tt0212049/

Bahía blanca (1985) https://www.imdb.com/title/tt0086931/

Riflessi di luce (1988) https://www.imdb.com/title/tt0143835/

Vortice mortale (1993) https://www.imdb.com/title/tt0105785/

As this is done in the same way, I can only assume this is being done by the same user. Can an admin please contact this user and get them to stop messing up cast lists like that?