@since: BuddyPress 1.2.2
Description
bp_core_validate_user_signup()

Validate a user name and email address when creating a new user.

Source: bp-members/bp-members-functions.php:1670

bp_core_validate_user_signup

Filters the result of the user signup validation.

Source: bp-members/bp-members-functions.php:1754

bp_core_validate_blog_signup()

Validate blog URL and title provided at signup.

Source: bp-members/bp-members-functions.php:1768

bp_core_new_user_activity()

Create a “became a registered user” activity item when a user activates his account.

Source: bp-members/bp-members-activity.php:74

bp_activity_permalink_redirect_url

Filter the intended redirect url before the redirect occurs for the single activity item.

Source: bp-activity/screens/permalink.php:86