I have submitted my site 50 times for 10 straight days to MSN and nothing ever bad happened to my site. I also auto submit my sites every 3 months for the last 2 years and nothing bad ever happened.
Saying its bad or something negative will happen is not true. I see ALOT of people say this, and i dont know why.
ALL submitting your site to search engines does is give your url to a POOL of urls that will be crawled by the spiders and robots of that particular engine. Thats it. REGARDLESS of if its manual or auto.
Dont you think that once you ad your url to the search engine its smart enough to see if you added your url already.
Seriously if you think theres a difference you need help.
Why is this still an issue?