With the inconvenience? If you're at church and the kid in the row behind you is watching YouTube videos with the volume turned up you're okay with the inconvenience? You're standing in line at the grocery store and the guy behind you keeps sliding right up next to you to the point where it feels like he's in your back pocket and you're okay with the inconvenience?
Sometimes life is inconvenient. A tired baby crying in an airport. A rock breaking a car windshield. But if it's not accidental - if you have control to change it - there's a good chance it's rude, disrespectful, or thoughtless. Someone else's inconsiderate actions are not the same as an inconvenience.
If you are fat enough to ooze into the seats of the person /people next to you, then loose some weight or buy two seats because otherwise you're you're not inconveniencing your fellow passengers. You are being rude and thoughtless.