The Internet has been wonderful for family research . . . and has been detrimental all in one. I'm very grateful for the opportunity to use resources such as Ancestry which have provided me with the luxury to search things I'd never be able to do otherwise. But, the downside is that it makes the false trees all the more likely to spread.
I do have my tree online, but only that portion that I've been able to document. (I haven't updated it in a while, mostly due to time.) However, I have my tree set so that no one can download it. If they want that info, they're going to have to painstakingly enter the data line by line. My theory on this is that I've done a lot of work and am meticulous about sourcing my data. It's my hope that if someone finds a name in my tree that matches one in theirs, they'll hijack my data rather than the poorly sourced data. I may be only one voice, but if the correct data can outweigh the faulty data, then I've done my job.
I agree with you MissPrissy, about the LDS records. You have to take them all with a grain of salt, particularly the published trees. Two entries in their records regarding my grandmother are the source that has spread like a disease in the online trees. As far as I know, there is no way to correct it, either. So, putting the correct information online is the only way to do so.
Now, that said, the two day trip I took to SLC was one FUN research trip! There's nothing like hitting a library at the crack of dawn and not coming out except for a few minutes to stuff down some food and run right back in there until they throw you out at the end of the day.
So, who else travels for research? It's one of my favorite things to do and has opened doors for research that otherwise would have been brickwalls.