Update 2016-11-05: I am now a vegan, in the true sense of the word. The thoughts in this post are already outdated.
I might just become a vegan someday. Even if I do, I will continue to accept all types of food at dinner parties and in every situation where vegan food is not easily accessible. To me, the critical part of being vegan is not the label that you acquire by rejecting all animal products; it's changing your usual food choices — what you cook yourself at home and what you buy for lunch in the city. I don't want my whole life to revolve around foraging, and neither would that be necessary so I can call myself a vegan. To some, I can therefore never be a vegan, but I don't care. The positive impact I want to have in my life shall outweigh the meat I do eat, and the avoidance of meat and dairy shall not divert me from more relevant activities. I'm an omnivore, and ethics-based dietary choices take this constitution into account.
When I return to Germany, I am going to have some Leberkas, and I won't even try to estimate if this pleasure outweighs the statistical pig suffering for it.