I really feel like it should just be you need to put the artist in the title, tag or not. A lot of the time the tags are hard to see or don't include the creator's name. I've also noticed hints of people seemingly trying to take the tag out
(not what you did, that was a mistake, and ty for putting their name in the title after you noticed)
It isn't really that hard to just type in the person's name, so I think it's worth the incredibly small amount of trouble to just put their name in the title. Plus, if the tag is effective enough the person should be able to clearly type it out into the title anyways. Not only would the name of the artist really show how effective the tag is, it would also make it far easier for people to find the artist.
I just think it's a fair solution to both the artist and the poster, that's all. Just a suggestion really.