Only short term please. In long term, we're all dead!
Never tried but now that you have mentioned, it may not be a bad idea to paper trade their tips for few months and see who is better than others. If they work even 50% of the time then that's good enough.
Only (and biggest) downside I see about following them is that you'll become dependent on them and you won't learn anything on your own. If you like tips of an expert and that expert stop showing up suddenly then you're lost.