Thread:BertH/@comment-33802864-20180630224438/@comment-34106721-20180630233430

1) I think you can change your URL via Special:Contact.

2) Sadly, no. You can block anonoymous users, but not registered users, sorry. You could go and protect all pages, but that may not solve your problems. You can also report troublesome users via special:contact, iirc.