Just type type the company name out in full. If you have no intent to spoil company image, you wouldn't be posting your experience here.

There's no rule on this forum which says you can't tell the truth, or even the name of a company. Besides, if you're sure you're right, then even if someone thinks that company is heaven, you should be able to justify your opinion. Just putting something like A***z doesn't really help anyone.

Actually, there are such things stupid questions. For instance, if asking a question will make you seem less qualified for the job, it's better you not ask it and find out about it after the interview. And even if you think no questions are stupid, your interviewer might not share the same philosophy. So... just be careful and plan what you might want to ask.