It is much better to adjust your profile to prevent it from showing up in unwanted searches. For example, if you don't want to be approached by people looking for dates, you should leave the 'Single' group and/or join the 'In a relationship' group. Remove unwanted information from your profile using the Settings page (link at the top right of the page when you are logged in) or by leaving any groups which no longer apply to you (Go to the group page and click the 'leave group' link). If you still get unwanted contact you should report or block the person who is contacting you. If you don't have log in details for your profile you will need to claim it first.