It's always good to research beforehand. You can still give them a shot might you find negative information, becaus they might regret it or have changed. They could also then have a chance to tell you.
As long as you don't go into the crazy spectrum of asking people to "hack" their social media accounts etc.
I find that it is hard not to. Maybe not a guy I go on A date with but if I start liking someone I will of course, check out Facebook, and maybe do a Google search, I would not expect to find too much on there though but I guess it is good to look for a criminal record.
No, there is nothing wrong with it. I'd do the same if I were in your position.
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Home > Dating > Is there anything wrong with researching someone you have been on date with or someone you will potentially date?