I think we need to differentiate on LBT stuff here. If we are talking about the whole movies being offered as downloads, then it would definitely do harm to Universals!
If we are talking of for example the songs being offered as downloads it is a little more difficult.
I confess that I did download some LBT songs from the internet. However, I recorded others from the original videos which I own, and burned them on a CD for my personal use or to send the CD as a gift to some friends of mine who love LBT as much as I do. So I could've done the same with the songs I downloaded from the internet, some of which (e.g. those from LBT 7) were never ever released on a sing along song video tape (only those from LBT 2 to 4 and 5 and 6 were). I do have an audio cassete of the German songs that was released along with the video (and a CD that was released a bit later) and the first English sing along video. The recording and burning of the songs from the original videos, and the downloading of songs from the internet which I could've recorded from the original videos otherwise didn't deceive Universal's for a dime, so I don't see anything wrong with it. If somebody downloaded the songs from the internet and didn't buy the videos because he would've only bought the original videos for the songs it would be a loss for Universals; but let's stay realistic: "how many people want to listen to the songs only and would buy the videos only for that rather than waiting until they can get the songs by taping the film once it is shown on TV"?
I do not think that screenshots of the movies which one can find everywhere in the internet do any harm to Universals either. On the contrary, they are like advertisments for the movie, and hardly a land before time webpage could exist without such screenshots! The same (except for the last statement) goes for advertisment videos for LBT such as those offered at
www.landbeforetime.org. Universals does BENEFIT from their comercials being spread like this, and so long those who put the songs, the comercials and screenshots in the internet don't earn money by doing so, I find it difficult to see anything wrong with it, or to put it straight, I do not see anything wrong with it at all.
Another possibility are excerpts from the movies being offered as downloads. Short scenes for example being offered for download for example if they are the topic of a discussion in a forum. For example if Arvens or I would put a short scene from LBT 10 (which you haven't seen) up here so you too could take part in a discussion about it. I see nothing wrong with that either.
Or different scenes from LBT being used to create a new video clip that doesn't earn any money to the creator but is more like a tribute, or a sort of commercial for a fanfiction that doesn't earn the author any money either (you are soon going to find examples for this in a new land before time gallery which is not yet finished). There is nothing wrong with that! Or do you disagree?