Some good points on this thread.
As the most prolific uploader of tracks in the UK to Rob’s SMP I think it would be foolish and risky to download any track from there to a GPS and just use it. If you did that with some of my tracks in the G/LD for instance you could be choosing a long route over several Wainwrights and not just to one or two SOTA summits. That is why Rob created a comments box for details.
So it is user beware as far as I am concerned - you need to download a track and then evaluate it in detail before setting out using your own maps and IT based tools before deciding to use all or part of it. If you don’t do that and you run into trouble then it is your fault and your fault only and not the person who has kindly offered to make that GPX information available to anyone who wants to use it.
Alan said we should think twice about downloading more than one track to each summit - not so in my opinion as there can be multiple routes to a top. Yuu can do a straight up and downer or make a walk of it by doing a circular scenic route if you have the time. The user can decide which he/she prefers.
On the times I have gone the wrong way up to a summit or gone around the houses, or felt it was a challenging and risky route I either edit the route to something better, or I add a caveat to the comments, or I don’t bother uploading it.
So if you do what Adrian says: “A bit like amateur radio - I rarely copy a project exactly from a published article, but they provide a good starting point…” you won’t go far wrong.
As Paul says - “experience and ability are of prime importance”. So don’t take on more than you are capable of unless you want to risk your life!
The SMP is a fantastic resource. I use it a helluva lot. We must remember this facility isn’t provided out of SOTA fund raising, the creator Rob DM1CM pays for it himself, so a modest PayPal donation I’m sure, is always appreciated!