Is this ok/legal/not recommended?
Hi,
When you check the project (compile time) you will see you get an error. For those cases where you want to keep the power port net name (you can change it, you know), you need to use a special component made by you, you are looking for the "net tie".
1. It's symbol is basically just two pins side by side, I usually put some colored line between them so I know visually very fast that I have there a net tie. Then in the Inspector you set it to Type=Net Tie (no BOM) (first you select the component in the SCH Library).
2. The footprint is made by adding 2 pads, very close and linking them by a short Copper Region. By double clicking on the name in the PCB library you will have an offer to change the name and also to change the type, again to Net Tie.
3. Make a component and add it to your library to be used when needed.
You may use this link for further info: https://www.altium.com/documentation/knowledge-base/altium-designer/how-to-short-two-different-nets---create-a-net-tie