An NDA only really has teeth if you:

a. expect to be sued when you breach it, and/or

b. have a reputation to uphold that would be tarnished by your having broken an NDA.

With respect to (a), Carrion Fields LLC is probably on the "not very likely" side of the "willingness to incur the expense of actually suing someone" spectrum.

With respect to (b), not everyone who might be asked to sign the NDA is a software developer in his day job.

There are also forms of "abuse" that an NDA wouldn't cover, or that would be extremely hard to pin on the abuser.