This is a civil matter.
This question calls for an opinion and opinions differ. Do not remove answers simply because you disagree with themIt is a matter of personal preference.
Not enough information to answer. What were the circumstances and why did you do it? If you accessed the facility with the intent to conceal the fact that you had been there for some criminal purpose, or with an intent to defraud, yes, it MIGHT be prosecutable.
steal them at night
If you have a criminal record (felonies)it will be there forever so it cannot be removed.
No
Sound isn't matter, it's a wave propagating through matter. Remove all matter, as in vacuum, and you won't hear a thing.
to remove suspended particulate matter
There are a few methods you could use. One of them is spyware removers, such as Spyware Doctor. Another one is to remove it manually: http://www.2-viruses.com/remove-personal-antivirus
No, they cannot.
yes
When thermal energy is added the matter goes slower
You may remove some beneficial, commensal organisms