There is no way to avoid it. Wrong information is everywhere.
Wrong information is in online “trees.” Wrong information is in blog posts. Wrong information is in online websites. Wrong information is in printed books. Wrong information is in original records. Whenever a document has the potential to be correct it also has the potential to be wrong. With any positive comes the negative.
Some gnash their teeth over it. Some complain in blog posts and online forums about it. Others rant on Facebook about it. Genealogical speakers talk about it. Writers write about it.
A genealogist can bypass the sites that contain online “trees” as a way to avoid some of the wrong information. While understandable, it is an imperfect solution. Some online trees are accurate, containing solid information. Others are not. Even while the trees on the “big sites” can be avoided, online information cannot be avoided entirely, particularly if one performs Google searches to potentially locate photographs, transcriptions of actual records, and the like. Information from those erroneous trees will also come up in general searches of the entire internet.
Locating information online that ones knows is incorrect can be extremely frustrating–especially when it involves family members that we knew personally or includes ancestors we have spent years painstakingly researching.
But…we cannot correct it all. Once the wrong stuff is out there it can be difficult, if not impossible, to control.
Some individuals will not respond to even the most polite inquiries about “where did you get that?” and curt, blunt emails are less likely to get a response.
Make certain your compiled information is as accurate as you can make it. Consider ways to publish or share that information with others.
Your time may be better spent being as accurate as you can and sharing that information with others instead of trying to convince someone else they are wrong.
Just some thoughts. Your mileage may vary.