You can block someone on LinkedIn by selecting the "Report / Block" option from a user's profile, then confirming your intent to block them. This feature allows you to prevent unwanted messages and view their profile. LinkedIn has limited the number of profiles that can be blocked to 1,000, so it's recommended to only accept requests from users you know personally or are interested in connecting with. You can find more information on LinkedIn tutorials and integrations at Zapier's LinkedIn page.