You don't have to scour the internet all that hard to unearth a great fountain of alien abduction stories.
Unfortunately, in an age in which everyone has photoshop, the reliability of photographic evidence goes to zero and "I know what I saw" isn't a scientifically valid stance. Many "encounters", under closer inspection, turn out the be something else. That's not to say the person telling the story is a liar, but all sorts of things, from drugs to psychological trauma, can cause people to have mind-bending experiences. Often, the most mundane solution is unfortunately the most likely.
However, in a universe the size of ours, it's not beyond the realms of possibility, maybe they are travelling thousands of light years to stick probes in us after all.
If you do ever find yourself aboard a spaceship, however, try to nick something off a shelf as a souvenir. Anything aboard an alien lightship would completely turn the scientific community on its head.
Here we have a few stories from people who claim to have had "encounters". These are just a few archetypal tales, but there is a positive smorgasboard of stories and testimonies on sites such as Reddit (although we can't exactly vouch of their reliability) if that's what you're into.