There are perils to campaigning in the digital age. As candidates work to raise funds and raise their profiles, several likely 2016 hopefuls are seeing their names appropriated for website addresses that support various political causes — and even their rivals.

As the first one to officially join the campaign, Sen. Ted Cruz (R., Texas) likely wanted people to visit his website when he announced on Monday. But visits to several sites with his name bring up jokes. The site tedcruz.com brings up a simple banner that says “Support President Obama. Immigration Reform Now!” The domain tedcruzforamerica.com redirects viewers to Healthcare.gov, and the only thing available at tedcruzforamerica2016.com is a photo of likely Democratic candidate Hillary Clinton, appearing to be disapproving. Mr. Cruz’s official campaign website is tedcruz.org.