In as much as it pertains to me, I don’t tolerate it. Otherwise, if people want to bullshit their way through their career, I don’t really care. This happens in every company that has more than one employee (almost).
If someone else starts ordering me around when they don’t have the authority to do so, assuming it would change my course of action, I’ll tell them politely that I might be able to get to that when I have time. If they escalate it, I tell them to talk to my boss about rearranging my priorities. And if they do that and succeed, that’s fine. Once you establish that you don’t report to them, I’ve found they typically leave me alone. If not, I talk to my boss about it in private.