The advertisement features a topless woman under the heading “Wanna get wet and wild?” and lists the names Amber, Maria, Rifa, Izzy and Mandy as the organisers, alongside the numbers to call. It is unknown who is responsible for the poster.

According to The Star Online, it was not the first time such a dirty tactic had been used by rally opposers.

Bersih 2.0 secretariat officer Mandeep Singh, whose number is among those on the poster, said: “Haiyo again ah? It happens every time ahead of a rally. It happened during Bersih 4, Tangkap MO1 and now Bersih 5.

“The last time it was about sex services and then it was call girl services, and now it’s foam bath.

“It is harassment, but we just need to keep on smiling and be strong. I personally am not going to lodge a police report, though,” he said.

PKR vice-president Rafizi Ramli said he had grown used to such acts.

“I am so used to this; every now and then my number will feature in some kind of lewd act. I take it as a joke. Sometimes I entertain people trying to get naked photos. I then send my photo to shock them,” said Rafizi.