I wear my otter tail to the arcade all the time. I usually wear it to the mall when I go, and I've worn it and just walked around streets and in town. I always have it on at friends houses too :>
I've never gotten any bad reactions to it. Most people don't care. Some ask questions like "Do you have a tail?", to which I respond "OH GOD!" and swat at it. I've had random people tell me they thought it was cool, some people stare, others give goofy comments, etc. The only people that give you any flak are high-school kids. I just laugh at anything negative thrown my way. Who cares what people think, just be yourself :3