@sillybillyboo1
Management can easily stipulate no fetish costumes or animal costumes. If i turned up to ikea as a furry i would expect to be asked to leave and if i took that personally it would be due to something wrong with me. And for this exact reasoning and thought process most people dont show up as a furry.
I'm really not trying to split hairs, but in order to create a rule you have to draw a line. You have drawn a line that exludes fetish wear, and furries, from your imaginary shop.
We have already established that Furries are not sexual, and are distinct from the sexually motivated Pups in the Dog Men Of IKEA Incident. If the sexual element of the Pups are the issue, then you'd be removing let's say, non neurotypical teenagers who find furry ears and a tail a comfort and enable them to leave the house to socialise.
Do you see where the difficulty lies? If the Dog men of IKEA have not broken a law, which as far as I can see they didn't, and I'm not saying that's right or wrong, just a fact, then how do you begin to remove people with certain items of clothing which are sexual in nature from your shop without gathering up others who are not, in the process?
If you took being asked to leave personally you feel it would be due to there being something wrong with you, which could be said is exactly the issue with people that cannot self regulate and fit in with society. There is something wrong with them. They have and always will exist and a sign above your shop door isn't going to make it not so.