It was a huge issue back in 2007-2008 which led to the start of the Arbor Project. We are starting to see it again and I am afraid we might have to get the organization more active. For example, in the past two weeks alone a resident has created 119 large neon blue ad towers by cutting up roadside plots and creating 16m - 64m plots promoting his estate. An area I might add where he doesn't allow ad towers. Making the mainland less livable to drive residents to his estates doesn't benefit Second Life. If you see any of these towers I recommend putting in an AR report. That practice certainly violated the LL policy on ad farming.
As to the comment:
They want LL to ban subdivsion under a certain land size, they want to ban the sale or transfer of land under a certain size, they want to make it illegal to build on parcels under a certain size.
That isn't true. What we don't want is a mainland filled with ad towers and deceptive practices (E.g. selling a 512 with a hole in the middle and griefing the resident to have to purchase it an inflated price. With Arbor, we have done small builds on microparcels that enhanced the SL experience. If everyone is considerate of their neighbors, this community thrives. If it is a "me at all costs" economic activity with no consideration of community members, then it isn't someone I want as a neighbor. Especially with a large blue ad tower.