Some, but not all, of the properties of tritium are somewhat friendly. The half-life is comparatively short at 12.5 years, so it isn't left for future generations. It is a beta-emitter, so shielding is straightforward. The daughter, helium-3, is quite benign. It can be readily encapsulated (see tritiated key fobs).
If it does get loose from encapsulation, it goes everywhere that hydrogen goes, which is largely everywhere. On the plus-side, gaseous tritium mixes and dilutes quickly in the atmosphere. The key is not to ingest concentrated quantities of it. The decay energy is very low, which makes assaying for tritium contamination quite challenging.
If you're looking for e-waste of radiological concern, americium smoke detectors might matter more. I'm not sure.