With that many I would suggest redirecting them to a relevant page rather than just stopping the indexing of them by submitting the links to Google Webmaster Tools. From what I've experienced, keeping the link juice flowing through your site by redirecting them is better for your overall SEO efforts.
Of course it's faster to submit the links to GWT…but that doesn't necessarily mean it's better. Regardless of what you do or how you do it, eliminating your crawl errors is very important.
