My understanding is that on job applications for pilots, there is a section (at least with Alaska) where you have to document your incidents and indicate what happened. They may or may not have an effect on your hiring, but I would assume that if you clipped the tail of another aircraft more than once under the same circumstances or have a record of incidences, then that would put a damper on your hiring. The section on the job application looks similar to the employment history section, though!
Save the whales...for dinner!!!