It's allowed technically, it may even be helpful later (see below), but I wouldn't recommend it for an early site.
"Seed questions" become harmful when folks come to believe that the author doesn't really care about the answer; or worse, the author doesn't even need any help at all! I wrote a blog post about this cited below, but worth a full read:
From Your New Site: Asking the First Questions …
Seeding the Site
I was a bit put off by the context implied by “seeding the site.” The word seeding suggests to me that we’re coming up with questions just for the sake of asking questions. My concern is, if people feel that the author doesn’t really care about the answer, the whole exercise would likely be perceived as a waste of time. …
The downside is that those hypothetical questions tend to be somewhat pedestrian for an expert Q&A site. When put on the spot to post content, we’re likely come up with uninspired questions that anyone would ask. And they’ve all been asked 100 times before on every other site on that subject.
One of the motivations driving this site the belief that you are helping others. Folks love to help others… but folks do not want to be given homework assignments or busy work.
If you have particularly interesting information to share, it's okay to share your knowledge, Q&A-style. If you have a particularly intriguing question asked out of genuine curiosity; that's okay, too. But I would stop short of flipping open that book of oft-asked questions to start seeding the site here.
So ask about problems you actually face. Encourage others to do the same. When you encounter obviously "seeded" questions, always moderate for quality. Questions with little effort or research should be closed with helpful guidance. But try not to let it devolve into endless interrogations of the author. They're likely just trying to help the site in good faith. But we have to continue to attract the experts we need… and the best way to do that is to keep the quality on that front page high.