Gary, You can call them anything you want but what is happening on Ebay is people are suckering unknowing people into buying a PEST anemone that they wish they could control. You say you can control them by limiting feeding them. Tell us how to do that and leave the rest of your tank alive. The other methods of removal are the same used for majanos, aptasia and any other pest anenome. As for clowns being a good judge of good and bad, they will host a koosh ball too.
If you read the eBay auctions, they always have a sentence or word in there that clears them of fraud.
The warnings should read. Only buy this if this is the only thing you want in your tank other than maybe fish.