Used to be when you died you were gone and only thing left was memories by loved ones. The internet is making people seem alive for ever. If your a poster or a blogger everything you have written. Will be around forever now and for those to see for generations. Friends and family can go and see all you have Blogged. People that don’t know you can get a feeling for who you were by what you have left behind.
Unless sites delete unused accounts your stuff should stay forever. There might come a time that space becomes a problem. Sites might delet you from the afterlife and universe. But will you be around for thousands of years from now? Maybe you your great grandkids 7 times removed can visit an old post. This might be a good thing or a bad thing..?
Theres Even Some Sites now that will deliver emails and letters after your dead. You can upload and write stuff you want then have it delivered 25-50 years later. What a way to screw with your wife or great grandkids..LOL Imagine getting email from your dead wife 20 years later. Well i would think its a hoax at first anyhow and just delete it. Then i would be mad because again she got the last word.