Bong Hits for Jesus - they assumed, bong=illegal drug use

I disagree with the ruling of the supreme court to Frederick. The banner was assumed as a pro-drug banner. As stated by school officials, the banner that read “bong hits 4 jesus” was pro-drug. It sounded like the school officials supported the fact that the banner which included the word ‘bong’ was to promote illegal drugs… lets look more into this.
In most states Marijuana is illegal. In most states drug parafinalia is illegal. But a bong, as well as tobacco papers is sometimes misconstrued as an apparatus for illegal drugs.
So how do we get bongs in the market? In almost all of the smoke shops that I have been to, merchants are not allowed to refer any of the smoking parafenallia for use of anything else but tobacco. For example, they would sell tobacco pipes, hookah pipes, tobacco bongs, water pipes for tobacco. All of the pipes or smoking devices is refered to and sold as tobacco smoking products. This is because if they market these products for something ‘illegal’ such as ‘marijuana pipe’, it will make their establishment illegal because of illegal parafenallia distribution. So smoke shops would sell the products under legal terms. Society now may realize that a bong is not nescessarily an illegal item for drugs. It just became a legal item for tobacco use.
Now considering the whole ‘tobacco pipe’ industry. A tobacco bong is completely legal for sale and use. A banner that read ‘marijuana hits 4 jesus’ may be pro-drug and the school officials have every right to discipline Frederick for a pro drug banner.
However, a banner the reads ‘bong hits 4 jesus’ has no indication that a bong is for tobacco or an illegal drug, marijuana for this matter, therefore deeming the school official reasoning for the allegation invalid for illegality. While reading this article, it feels like the school officials all the way up to the supreme court made the COMPLETE ASSUMPTION that the stated ‘bong’ word in the banner ‘bong hits 4 jesus’ was for marijuana and not of tobacco. The word bong is heavily misconstrued and assumed that the use for it is totally for illegal drug. When it could simply be a tobacco bong and deemed legal.