Yes familiar.
I had this for some time with a 'neighbour' who acted this way.. and is thankfully now long gone.
The use of alts to neg rate people out of silly spite is really immature, and acts of cowards and even today I can't even accidentally run across this person in SL without her then persuading someone else then to have a go at me childishly and them to neg rate me also even tho the events concerning it all are in the long past. Pathetic really.
I have even pointed out on my profile what happened and where these my only negs come from and she and her current friends object to me even publicising it, but I care not, and am just glad to be rid of her odious presence.
Have patience, these people run out of ideas and cease to be of any real importance.