this might come as a surprise, but I actually don't mind if people tag my Solanna art (Solas x OC) incorrectly. I know people make honest mistakes (I've done this plenty) or sometimes "Solavellan" is just their Solas romance tag on their blog and they don't bother to differentiate
I think the only time I would get upset is if they actually said "disregarding this is a human and tagging as Solavellan instead" (which no one has ever done lol)
however I still want to be mindful of other people's ship tags because it can be very personal and aggravating to see it wrongly tagged (and not everyone is a multishipper like me who is happy to see anything and everything, so they may want to filter out certain ships)
anyway, that's my thoughts on the matter!