As far as i know there isnt any rp server in ff14 so they have as much right to be there as any other player type
On my server there is a old highlander dancing in underwear near the aeterite, has been there everyday for at least 2 year, i see no problem with it, i actually think its funny

As for them trolling, do you have any proof they were actually trying to ruin your rp, in a server wich isnt in anyway reserved for rp

What next you will report someone who sprint in uldah instead of walking?