Not really, since javascript loaded into an image tag shouldn't run and I was already following an unknown link to an unknown location coming from an unknown se

Not really, since javascript loaded into an image tag shouldn't run and I was already following an unknown link to an unknown location coming from an unknown server. The risk that it was intercepted by you is low, and the consequences seem to be low too. You're also skipping straight over the risk that it happens at all, which is a fairly important part of a risk assessment.