@BlackHatCoiner raises good points but we should draw the line between being censorship resistance and having no limits and allowing everything. As a matter of fact, Bitcoin is filled with limitations. Limits in consensus rules such as number of allowed sigops, block size (weight), max op count, etc. and a lot of standard rules on top of that such as size of OP_RETURN.
All of these limitations are designed to keep the system healthy and we should fight to keep it that way.